pgtune 0.9.3

Closes Homebrew/homebrew#18120.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/pgtune.rb

@@ -0,0 +1,22 @@
+require 'formula'
+
+class Pgtune < Formula
+  homepage 'http://pgfoundry.org/projects/pgtune'
+  url 'http://pgfoundry.org/frs/download.php/2449/pgtune-0.9.3.tar.gz'
+  sha1 'c638ee3be7bd33f313c280cff9dee2d47bb40e46'
+
+  # 0.9.3 does not have settings for PostgreSQL 9.x, but the trunk does
+  head 'https://github.com/gregs1104/pgtune.git', :branch => 'master'
+
+  def install
+    # By default, pgtune searches for settings in the directory
+    # where the script is being run from. We replace the default
+    # path with pgtune_share.
+    pgtune_share = share/'pgtune'
+    inreplace 'pgtune' do |s|
+      s.sub! /(parser\.add_option\('-S'.*default=).*,/, "\\1\"#{pgtune_share}\","
+    end
+    bin.install 'pgtune'
+    pgtune_share.install Dir['pg_settings*']
+  end
+end